Google has added a few experimental features to Google Music including the ability to trigger desktop notifications in Chrome, an HTML5 player, and five star rating in place of the thumbs up.

Tucked away inside the settings menu (or directly here) you can enable the experimental features for yourself. The desktop notifications pop up a simple notification with the currently playing track, but you need Chrome for it to work. More handy is the HTML5 audio player that ditches Flash in favor of a more lightweight music player. Finally, if you have trouble deciding between thumbing up a song and thumbing it down, you can now use a five star scale to decide exactly how much you really like a track.

As always, these features may disappear at any time, but it's worth checking them out while you can, especially if you're sick of the Flash player taking up resources.